Eagltree RPM Sensor Magnets...

[J-S-Q]

Just about to epoxy the magnet on my 600N main gear for an Eagletree rpm sensor. Does it matter which way up I put the magnet? I'm guessing not but can anyone confirm this?

[est1976]

According to the manual :

#1- the red line on the magnet is supposed to be opposite the sensor.

#2- the flat side of the sensor is supposed to be parallel to the magnet.

A shot of the sensor install from the manual is attached. If you don't have a manual, you can download from EagleTree's website.

[J-S-Q]

That's strange -my sensor didn't come with any instructions and there's no writing on the sensor. I wonder if I have a different version from yours? I have made a mount like the one in this thread:

http://www.rcheliaddict.co.uk/main-d...-question.html

I was under the impression that I mount the sensor pointing downwards towards the magnet.

[crash-alot]

You are suppose to bend the sensor so the writing on the sensor face the magnet

[est1976]

tbh I have an brushless sensor (all electric here) I got that info from eagletree forum on rcgroups. is your rpm sensor eagletree branded or a 3rd party one?

[J-S-Q]

You are suppose to bend the sensor so the writing on the sensor face the magnet

There's no writing or marking of any kind on my sensor. the edges on one side of it are slightly chamfered and on the other side they are not chamfered. Was this the case on your sensor?
I've had another look at the photo of your installation -are you saying that you have bent the sensor around the bottom of your carbon mounting plate so that it is laying horizontally over the magnet?

[crash-alot]

The chamfered side towards the magnet. I've bent the sensor so that the non chamfered side is glued to the bottom of my carbon mount for extra strength. I've also applied a small band of heatshrink around the cable and mount and soaked it in CA to reinforce it even further.

I had to add a couple of washers between the mount and the frame to create a bit of a stand-off.

There's no writing or marking of any kind on my sensor. the edges on one side of it are slightly chamfered and on the other side they are not chamfered. Was this the case on your sensor?
I've had another look at the photo of your installation -are you saying that you have bent the sensor around the bottom of your carbon mounting plate so that it is laying horizontally over the magnet?

[rceccleston]

*Tip* - Drill a really small hole thro the main gear, in the allocated magnet mount hole, to stop the epoxy popping the magnet back out.

Else, in time, the pressure of the glue under the magnet can not escape so will pop the magnet back out.

Here is a picture from the underside of my T-Rex 600 main gear.



It's hard to see how the hole is filled with epoxy from when the magnet was installed.

Here is how I mounted the RPM sensor on my 12s T-Rex 600 ESP.



I made a small carbon mounting arm, rapped in heat shrink and held in place by a bolt from the boom block.

[J-S-Q]

Ok I think it's all clear now so thanks very much. Good tip on mounting the magnet as well but too late for me I'm afraid as I've already glued it in.